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5-mg suspended mirror driven by measurement-induced back-action
Nobuyuki Matsumoto, Kentaro Komori, Yuta Michimura +3
Quantum mechanics predicts superposition of position states even for macroscopic objects. Recently, the use of a quasi-freely suspended mirror combined with laser was proposed to p…
Optical-Cavity Limits on Higher-Order Lorentz Violation
Yuta Michimura, Matthew Mewes, Nobuyuki Matsumoto +2
An optical ring cavity is used to place the first laboratory constraints on parity-odd nonrenormalizable Lorentz violation. Variations in resonant frequencies are limited to parts…
Testing Lorentz Invariance with a Double-Pass Optical Ring Cavity
Yuta Michimura, Nobuyuki Matsumoto, Noriaki Ohmae +4
We have developed an apparatus to test Lorentz invariance in the photon sector by measuring the resonant frequency difference between two counterpropagating directions of an asymme…
Interferometer design of the KAGRA gravitational wave detector
Yoichi Aso, Yuta Michimura, Kentaro Somiya +5
KAGRA is a cryogenic interferometric gravitational wave detector being constructed at the underground site of Kamioka mine in Gifu prefecture, Japan. We performed an optimization o…
New Limit on Lorentz Violation Using a Double-Pass Optical Ring Cavity
Yuta Michimura, Nobuyuki Matsumoto, Noriaki Ohmae +4
A search for Lorentz violation in electrodynamics was performed by measuring the resonant frequency difference between two counterpropagating directions of an optical ring cavity.…